The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 06, 2002
Filed:
Dec. 04, 2000
Applicant:
Inventors:
Richard C. Denton, Slave Lake, CA;
Gorgen Akerlund, Sollentuna, SE;
Assignee:
West Fraser Timber Co. Ltd., Slave Lake, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21C 9/16 ;
U.S. Cl.
CPC ...
D21C 9/16 ;
Abstract
A process for final bleaching cellulose-containing pulp which has been subjected to previous bleaching with a peroxide compound. The process involves the sequential steps of exposing the pulp to an amount of a reducing agent in order to eliminate residual peroxide compound from the pulp and then final bleaching the pulp by exposing the pulp to an amount of formamidine sulfinic acid.
Denton, Richard. (2002). Method of bleaching with formamidine sulfinic acid using a reducing agent to eliminate residual peroxide (U.S. Patent No. 6428653). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6428653
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile